Two kinds of filling morphologies existed in filling process of indirect squeezing casting thin-walled components were described

and factors influencing filling morphology were approached on the basis of jet theory. Furthermore

it was pointed out that optimal filling velocity should be gradually accelerated. In addition

from the view point of fluid kinetics

the filling process of liquid metal was analyzed

and the conditions that the optimal filling velocity should be satisfied were determined theoretically. Finally

as an example

the optimal filling velocity of a thin-walled component was presented by the equation.